4-Pyrone on treatment with acid gets protonated on the carbonyl group oxygen to yield a stable product. Why the structure is so stable is to be explained using resonance structures and the Huckel’s (4n+2) rule. Concept introduction: A compound to become aromatic should obey Huckel’s rule. According to Huckel’s rule, any specie that is cyclic, planar and has (4n+2) delocalized Ï€ electrons will be aromatic and stable. Thus species with 2, 6, 10, 14 etc. Ï€ electrons will be aromatic and stable. To explain: Using resonance structures and the Huckel’s (4n+2) rule why the protonated product obtained when 4-pyrone reacts with acid is so stable.

Question

On reaction with acid, 4-pyrone is protonated on the carbonyl-group oxygen to give astable cationic product. Using resonance structures and the HĂ¼ckel 4n + 2 rule,explain why the protonated product is so stable

Answer 1

Question

Definition Definition Rule that estimates whether a given organic planar ring structure will show an aromatic property. A cyclic ring molecule is said to follow Hückel’s rule if the л-electrons count in a molecule is [4n+2], where n stands for a positive numerical value. It is also called the [4n+2] rule. Hückel's rule, sometimes referred to as the aromaticity rule, is one but not the only criteria to judge a molecule for aromaticity.

Chapter 15.SE, Problem 42AP

Interpretation Introduction

Interpretation:

4-Pyrone on treatment with acid gets protonated on the carbonyl group oxygen to yield a stable product. Why the structure is so stable is to be explained using resonance structures and the Huckel’s (4n+2) rule.

Concept introduction:

A compound to become aromatic should obey Huckel’s rule. According to Huckel’s rule, any specie that is cyclic, planar and has (4n+2) delocalized Ï€ electrons will be aromatic and stable. Thus species with 2, 6, 10, 14 etc. Ï€ electrons will be aromatic and stable.

To explain:

Using resonance structures and the Huckel’s (4n+2) rule why the protonated product obtained when 4-pyrone reacts with acid is so stable.

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Answer 2

Question

Definition Definition Rule that estimates whether a given organic planar ring structure will show an aromatic property. A cyclic ring molecule is said to follow Hückel’s rule if the л-electrons count in a molecule is [4n+2], where n stands for a positive numerical value. It is also called the [4n+2] rule. Hückel's rule, sometimes referred to as the aromaticity rule, is one but not the only criteria to judge a molecule for aromaticity.

Chapter 15.SE, Problem 42AP

Interpretation Introduction

Interpretation:

4-Pyrone on treatment with acid gets protonated on the carbonyl group oxygen to yield a stable product. Why the structure is so stable is to be explained using resonance structures and the Huckel’s (4n+2) rule.

Concept introduction:

A compound to become aromatic should obey Huckel’s rule. According to Huckel’s rule, any specie that is cyclic, planar and has (4n+2) delocalized Ï€ electrons will be aromatic and stable. Thus species with 2, 6, 10, 14 etc. Ï€ electrons will be aromatic and stable.

To explain:

Using resonance structures and the Huckel’s (4n+2) rule why the protonated product obtained when 4-pyrone reacts with acid is so stable.

Expert Solution & Answer

Trending nowThis is a popular solution!

See solution

Check out sample textbook solution

Answer 3

Question

Definition Definition Rule that estimates whether a given organic planar ring structure will show an aromatic property. A cyclic ring molecule is said to follow Hückel’s rule if the л-electrons count in a molecule is [4n+2], where n stands for a positive numerical value. It is also called the [4n+2] rule. Hückel's rule, sometimes referred to as the aromaticity rule, is one but not the only criteria to judge a molecule for aromaticity.

Chapter 15.SE, Problem 42AP

Interpretation Introduction

Interpretation:

4-Pyrone on treatment with acid gets protonated on the carbonyl group oxygen to yield a stable product. Why the structure is so stable is to be explained using resonance structures and the Huckel’s (4n+2) rule.

Concept introduction:

A compound to become aromatic should obey Huckel’s rule. According to Huckel’s rule, any specie that is cyclic, planar and has (4n+2) delocalized Ï€ electrons will be aromatic and stable. Thus species with 2, 6, 10, 14 etc. Ï€ electrons will be aromatic and stable.

To explain:

Using resonance structures and the Huckel’s (4n+2) rule why the protonated product obtained when 4-pyrone reacts with acid is so stable.

Expert Solution & Answer

Trending nowThis is a popular solution!

See solution

Check out sample textbook solution

Answer 4

Question

Definition Definition Rule that estimates whether a given organic planar ring structure will show an aromatic property. A cyclic ring molecule is said to follow Hückel’s rule if the л-electrons count in a molecule is [4n+2], where n stands for a positive numerical value. It is also called the [4n+2] rule. Hückel's rule, sometimes referred to as the aromaticity rule, is one but not the only criteria to judge a molecule for aromaticity.

Chapter 15.SE, Problem 42AP

Interpretation Introduction